Add way for PermissionContext to be automatically restricted to secure origins.

chrome/browser/push_messaging/push_messaging_permission_context.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/push_messaging/push_messaging_permission_context.h"
 
 #include "chrome/browser/content_settings/permission_context_uma_util.h"
 #include "chrome/browser/notifications/desktop_notification_service.h"
 #include "chrome/browser/notifications/desktop_notification_service_factory.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 84 matching lines @@
       web_contents, id, requesting_origin, user_gesture,
       base::Bind(&PushMessagingPermissionContext::DecidePushPermission,
                  weak_factory_ui_thread_.GetWeakPtr(), id, requesting_origin,
                  embedding_origin, callback));
 #else
   NotifyPermissionSet(id, requesting_origin, embedding_origin, callback,
                       false /* persist */, CONTENT_SETTING_BLOCK);
 #endif
 }
 
+bool PushMessagingPermissionContext::RestrictToSecureOrigins() const {
+  return true;

[ddorwin, 2015/05/26 17:31:31]

This is a change in behavior (like MIDI in the other CL), right?

[mlamouri (slow - plz ping), 2015/05/29 14:35:15]

Correct.

+}
+
 void PushMessagingPermissionContext::DecidePushPermission(
     const PermissionRequestID& id,
     const GURL& requesting_origin,
     const GURL& embedding_origin,
     const BrowserPermissionCallback& callback,
     ContentSetting notification_content_setting) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   ContentSetting push_content_setting =
       profile_->GetHostContentSettingsMap()
           ->GetContentSettingAndMaybeUpdateLastUsage(
@@ skipping 14 matching lines @@
     NotifyPermissionSet(id, requesting_origin, embedding_origin, callback,
                         false /* persist */, notification_content_setting);
     return;
   }
 
   PermissionContextUmaUtil::PermissionGranted(kPushSettingType,
                                               requesting_origin);
   NotifyPermissionSet(id, requesting_origin, embedding_origin, callback,
                       true /* persist */, CONTENT_SETTING_ALLOW);
 }